Added comments on not set node network/inode condition to unknown.

pkg/controller/node/nodecontroller.go

@@ -833,8 +833,8 @@ func (nc *NodeController) setLimiterInZone(zone string, zoneSize int, state zone
 	}
 }
 
-// For a given node checks its conditions and tries to update it. Returns grace period to which given node
-// is entitled, state of current and last observed Ready Condition, and an error if it occurred.
+// tryUpdateNodeStatus checks a given node's conditions and tries to update it. Returns grace period to
+// which given node is entitled, state of current and last observed Ready Condition, and an error if it occurred.
 func (nc *NodeController) tryUpdateNodeStatus(node *v1.Node) (time.Duration, v1.NodeCondition, *v1.NodeCondition, error) {
 	var err error
 	var gracePeriod time.Duration
@@ -910,7 +910,6 @@ func (nc *NodeController) tryUpdateNodeStatus(node *v1.Node) (time.Duration, v1.
 		// otherwise we leave it as it is.
 		if savedCondition.LastTransitionTime != observedCondition.LastTransitionTime {
 			glog.V(3).Infof("ReadyCondition for Node %s transitioned from %v to %v", node.Name, savedCondition.Status, observedCondition)
-
 			transitionTime = nc.now()
 		} else {
 			transitionTime = savedNodeStatus.readyTransitionTimestamp
@@ -955,7 +954,16 @@ func (nc *NodeController) tryUpdateNodeStatus(node *v1.Node) (time.Duration, v1.
 		}
 
 		// remaining node conditions should also be set to Unknown
-		remainingNodeConditionTypes := []v1.NodeConditionType{v1.NodeOutOfDisk, v1.NodeMemoryPressure, v1.NodeDiskPressure}
+		remainingNodeConditionTypes := []v1.NodeConditionType{
+			v1.NodeOutOfDisk,
+			v1.NodeMemoryPressure,
+			v1.NodeDiskPressure,
+			// We don't change 'NodeInodePressure' condition, as it'll be removed in future.
+			// v1.NodeInodePressure,
+			// We don't change 'NodeNetworkUnavailable' condition, as it's managed on a control plane level.
+			// v1.NodeNetworkUnavailable,
+		}
+
 		nowTimestamp := nc.now()
 		for _, nodeConditionType := range remainingNodeConditionTypes {
 			_, currentCondition := nodeutil.GetNodeCondition(&node.Status, nodeConditionType)
@@ -1091,7 +1099,7 @@ func (nc *NodeController) ReducedQPSFunc(nodeNum int) float32 {
 	return 0
 }
 
-// This function is expected to get a slice of NodeReadyConditions for all Nodes in a given zone.
+// ComputeZoneState returns a slice of NodeReadyConditions for all Nodes in a given zone.
 // The zone is considered:
 // - fullyDisrupted if there're no Ready Nodes,
 // - partiallyDisrupted if at least than nc.unhealthyZoneThreshold percent of Nodes are not Ready,